Toyota prius 3rd gen Outer Mirror Switch Assembly (L18)

Toyota Prius 3 ^rd Generation (XW30)

Outer Mirror Switch Assembly Wiring Guide: DIY Pinout Diagram

What is: The Vehicle Outer Mirror Switch Assembly is a driver-controlled unit used to adjust the position of the exterior side mirrors. It allows selection of the left or right mirror and controls mirror movement for proper visibility. In some vehicles, it also manages mirror folding and heating functions, helping improve driving safety and convenience.

Outer Mirror Switch Assembly (84870-28020)

Prius 3rd gen mirror switch wiring connector view

Toyota Prius 3rd gen outer mirror switch assembly 84870-28020

Prius 2010–2015 power mirror control switch close-up

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1. Introduction

      The  Toyota Prius 3rd Generation Outer Mirror Switch Assembly (84870-28020) is an essential interior control component that allows the driver to precisely adjust the position of the left and right exterior mirrors. Integrated into the driver’s door panel, it provides convenient mirror selection and directional control for improved rear and side visibility. In equipped models, the switch also supports power-folding mirror operation, enhancing convenience in tight parking spaces. Designed to work seamlessly with the Prius electrical system, this switch assembly ensures reliable performance, smooth operation, and improved driving safety by maintaining correct mirror alignment at all times.

Related parts and Accessories

• Outer Rear View Mirror Assemblies (LH & RH) :-Motorized mirrors with position actuators
• Mirror Adjustment Motors:-Control vertical and horizontal mirror movement
• Power Folding Mirror Motors (if equipped):-Fold mirrors inward electrically
• Mirror Heater Elements (if equipped):-Prevent fogging and ice buildup
• Door Wire Harness:-Transmits switch signals and power
• Body ECU / Main Body ECU:-Processes mirror control signals

2. Outer Mirror Switch Assembly Wiring Diagram & Pinout

A. Connector Location

• Outer Mirror Switch Assembly Position: Located on the driver-side lower instrument panel, behind the LH cowl side trim, near the front door scuff plate.




• Connector Type:
  • L18 (10 pin) White housing

B. Wiring Table

Outer Mirror Switch Assembly (L18)

L18 TERMINALS OF Outer Mirror Switch Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
L18-1	_	_	_
L18-2	HR	(T) Yellow	➳ NL1 22 ➔ N3 3 (MH) [Outer Rear View Mirror Assembly RH]
L18-3	VR	(LG) Light Green	➳ NL1 10 ➔ N3 5 (MV) [Outer Rear View Mirror Assembly RH]
L18-4	VL	(R) Red	➳ OL1 10 ➔ O3 5 (MV) [Outer Rear View Mirror Assembly LH]
L18-5	HL	(L) Blue	➳ OL1 22 ➔ O3 3 (MH) [Outer Rear View Mirror Assembly LH]
L18-6	M+	(G) Green	➔ ✠ ➳ NL1 9 ➔ N3 4 (M+) [Outer Rear View Mirror Assembly RH] ➔ ✠ ➳ OL2 10 ➔ O3 4 (M+) [Outer Rear View Mirror Assembly LH]
L18-7	E	(W-B) White/Black	➔ 3B 44 ⇔ 3A 67 ➔ L93 5 ⬌ L93 3 ➔ ▼ L1 (Ground Point)
L18-8	B	(GR) Gray	➔ 3B 42 ⇔ 3B 79 ➔ 2A 50 ➤ (ACC) 10A Blade Fuse [ECU-ACC]
L18-9	_	_	_
L18-10	_	_	_

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